JPH06107521A - Skin cleansing agent - Google Patents

Abstract

PURPOSE:To obtain a skin cleansing agent capable of carrying out removal of makeup and skin washing for cleansing stain on the skin and sebaceous matter in one step. CONSTITUTION:This skin cleansing agent containing no oil content is obtained by blending 1.0-80wt.% polyethylene glycol dioleate and/or polyethylene glycol diisostearate to which 10-18mol number of ethylene oxide is added.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel skin cleansing agent, and more specifically, it aims at removing makeup cosmetics such as lipsticks, foundations, mascaras, and eye shadows, and cleaning dirt and sebum on the skin. The present invention relates to a skin cleansing agent that can be used for washing the skin in one step.

[0002]

2. Description of the Related Art Conventionally, people who have applied makeup cosmetics containing oils such as lipsticks, foundations, mascaras, and eye shadows are the first step when cleaning their face, and the first step is to make them look like a solvent that is easily compatible with makeup cosmetics. After using a cleansing cream containing a large amount of oil, a cleansing oil, a cleansing milk, a cleansing gel for cleansing makeup, etc., as a second step, a cleansing cream for cleansing the makeup used (cleansing cream, Residual oil content of cleansing oil, cleansing gel, cleansing milk, etc.) is washed away with sebum and dirt on the skin using a facial wash for bare skin washing such as highly water-soluble soap and cleansing foam, and a feeling of refreshing or refreshing feeling is satisfied. I was getting a feeling. As described above, it is necessary to perform the two-step washing after using the makeup removing creams containing a large amount of oils, and immediately after rinsing with water or lukewarm oil, the oil content remaining on the skin is sufficient. This is because it cannot be removed and a refreshing feeling cannot be obtained. Also, washing with only a detergent such as soap cannot sufficiently remove pigments and coloring materials covered with oil present on the skin. This is because. However, in recent years, when the quickness and simplicity of cosmetics are being demanded, in the market where products that can meet the demand are being demanded, the makeup removing effect and the cleansing and refreshing bare skin washing effect can be achieved with only one operation. There is a demand for a skin cleansing agent having both of the following features. As such a one-step skin cleansing agent, for example, JP-A-63-1
Some are disclosed in Japanese Patent No. 22618.

[0003]

However, with respect to recently developed so-called hard make-up cosmetics such as lipsticks, foundations, mascaras, and eye shadows, which have a makeup-preserving effect with excellent sweat resistance and water resistance, The one-step skin cleansing agents that have been reported so far have not been sufficiently satisfactory in terms of cleansing effect and feeling of use. The present inventor has conducted extensive studies to solve such problems, and as a result, found that a surfactant of a specific type and structure exhibits an extremely excellent effect, and completed the present invention.

[0004]

[Means for Solving the Problems] That is, the present invention comprises the addition of 1.0 to 80% by weight of polyethylene glycol dioleate and / or polyethylene glycol diisostearate in which the added mole number of ethylene oxide is 10 to 18. It is a skin cleansing agent containing no oil.

The skin cleansing agent of the present invention has the effect of cleaning oils such as make-up cosmetics, and can be washed off with water to give a clean and refreshing bare skin cleansing effect. It is a cloudy cleaning agent.

The polyethylene glycol dioleate and polyethylene glycol diisostearate used in the skin cleansing agent of the present invention are liquid at room temperature and have excellent formulation stability, and are well compatible with oily makeup and washed with water. In the case of also, since it is self-emulsified and has good washability, dirt and makeup cosmetics can be easily washed off from the skin, and after use, it is clean and refreshing, and is most suitable as a one-step cleaning active agent. The number of moles of ethylene oxide added is 10
-18, preferably 11-13. When the number of added moles of ethylene oxide is less than 10, the lipophilicity is strong and the composition is well compatible with oily makeup, but it is not sufficiently washed with water and the bare skin washing effect is weak. Also, the stability over time is not good. When the number of added moles of ethylene oxide exceeds 18,
The oily makeup does not fit well, the object to be washed remains on the skin, and the makeup removing effect is insufficient. In compounding, the above compounds are used alone or in combination. The compounding amount is 1.0 with respect to the total amount of the cleaning agent.
˜80 wt%, preferably 6-20 wt%. 1.
If it is less than 0% by weight, the detergency is insufficient, and if it exceeds 80% by weight, no further effect can be expected, which is economically disadvantageous and is not preferable in terms of safety.

The skin cleansing agent of the present invention may further contain 30% by weight or less of polyethylene glycol monooleate and / or polyethylene glycol monoisostearate having an ethylene oxide addition mole number of 4 to 14. The addition of these polyethylene glycol monofatty acid esters generally enhances the bare skin washing effect. When the number of moles of ethylene oxide added is less than 4, the lipophilicity is strong, and it is well compatible with oily makeup, but it is not sufficiently washed with water and the bare skin washing effect is weak. When the number of added moles of ethylene oxide exceeds 14, the oily make-up does not fit well, the object to be washed remains on the skin, and the make-up removing effect is insufficient. The compounding amount is up to 30% by weight based on the total amount of the cleaning agent. If it exceeds 30% by weight, the entire system becomes hydrophilic and the make-up removing effect is deteriorated, and it is not preferable in terms of safety.

Other surfactants used in the present invention include polyoxyalkylene-modified polysiloxane. This is a well-known raw material and has good compatibility with other components in the base system.Especially, the effect of easily emulsifying a hard makeup cosmetic containing a silicone oil or a silicon-modified powder and wiping it off with water It has. Structurally,

[0009]

[Chemical 1]

[Wherein R represents hydrogen or an alkyl group having 1 to 5 carbon atoms, p represents an integer of 1 to 5, x represents an integer of 5 to 30, and m and n represent an integer of 1 to 15]. Shown. A typical example thereof is a copolymer of dimethylsiloxane and methyl (polyoxyethylene) siloxane having an addition amount of ethylene oxide of 5 to 500 mol, and these are used alone or in combination of two or more. The blending amount is 0.5 to 30% by weight, preferably 3 to 20% by weight, based on the total amount of the skin cleanser. If it exceeds 30% by weight, it is not preferable in terms of skin safety and is economically disadvantageous.

The skin cleansing agent of the present invention further contains one or more selected from lower alcohols, polyhydric alcohols and their ethylene glycol adducts and propylene oxide adducts. Examples of the above water-soluble compound having a hydroxyl group used in the present invention include ethyl alcohol, isopropyl alcohol, butanol, propylene glycol, isopropyl glycol, 1,3.
Butanediol, dipropylene glycol, glycerin, diglycerin, polyglycerin, trimethylolpropane, erythritol, pentaerythritol, sorbitan, sorbitol glucose, maltitol, saccharose, trehalose, fructose, and their ethylene oxide adducts, propylene oxide adducts Examples of such derivatives include ethanol, dipropylene glycol, and 1,3-butanediol.
These are used alone or in combination of two or more. Of these, a slightly sparse one such as dipropylene glycol has an excellent cleaning effect on hard make-up cosmetics and is desirable as the cleaning composition of the present invention. The blending amount of these water-soluble compounds containing a hydroxyl group is preferably 1 to 40% by weight based on the total amount of the detergent of the present invention. Particularly preferably 5 to 2
It is 0% by weight. The balance of the entire composition is adjusted with water to 100.00% by weight.

The skin cleansing agent of the present invention contains substantially no oil. When oil is contained, a refreshing feeling,
The bare skin washing effect such as a refreshing feeling becomes unsatisfactory.
Further, the makeup removing effect is sufficiently exerted without containing oil. The oil here means, for example, hydrocarbons,
Higher alcohols, higher fatty acids, higher alcohol higher fatty acid esters, animal and vegetable oils, cholesterol fatty acid esters, silicones and the like, specifically, liquid paraffin, polyisobutene, isostearyl cholesteryl ester, 2-ethylhexanoic acid triglyceride,
Hexadecyl 2-ethylhexanoate, octadecyl myristate, olive oil, chain-like or cyclic methylpolysiloxane and the like can be mentioned.

The skin cleansing agent of the present invention is used by using each of the above components in a liquid state, or by using a water-soluble thickener together to form a viscous state or jelly state. The compounding composition in such a case can be appropriately determined by a compounding test of each component usually performed by a person skilled in the art. The skin cleansing agent of the present invention can be manufactured according to a conventional method.

The skin cleansing agent of the present invention further comprises a thickener, an ionic surfactant, which is commonly used in cosmetics, pharmaceuticals, etc.
A medicinal agent, a moisturizing component, an anti-inflammatory agent, a bactericidal agent, an antiseptic agent, an ultraviolet absorber, an antioxidant, organic and inorganic powders, pigments, fragrances and the like can be added if necessary. The skin cleansing agent of the present invention is mainly used as a facial cleanser for removing makeup cosmetics, but it can also be used for cleansing or massage.

[0015]

The present invention will be described below with reference to examples, but the present invention is not limited to these examples. Examples 1 to 7 and Comparative Examples 1 to 9 A skin cleansing agent was prepared by the following method with the composition (% by weight) described in Tables 1 and 2, and the organoleptic sensation thereof was evaluated based on the following evaluation criteria. The results are shown in Tables 1-2.

[Production Method] A water-soluble thickener which is difficult to dissolve in water is dissolved in advance, added to the main kettle together with other components, and uniformly mixed with a high speed mixer. Defoam and filter to obtain a skin cleanser.

[Evaluation Method and Evaluation Criteria] (1) Deterioration of Foundation and Use Feeling 18 healthy female panels (20 to 45 years old) were washed with bare skin,
After drying, apply a water-resistant oily foundation (sweat-resistant, water-resistant foundation) to the face, and after 30 minutes, apply the oily foundation using the product of the present invention and the comparative product, wash it with water, and then remove the foundation ( The makeup removing effect) and the refreshing feeling after use (bare skin washing effect) were evaluated. In each evaluation, the evaluation score is 100 points, and 18
This was done by taking the average score of the names.

Makeup removing effect ⊚: Evaluation score of 75 points or more (very well dropped) ○: Evaluation score of 50 to 75 points (falls) Δ: Evaluation point of 25 to 50 points (somewhat difficult to remove) ×: Evaluation point 25 points or less (does not fall)

Bare skin washing effect ⊚: Evaluation score of 75 points or more (very refreshing) ○: Evaluation score of 50 to 75 points (refreshing) Δ: Evaluation point of 25 to 50 points (somewhat left over) I feel it.) X: Evaluation score of 25 points or less (I feel the rest considerably.)

(2) Stability over time Each of the invention products and comparative products after preparation was filled in a glass bottle (with a lid) for up to 9 minutes and left in a constant temperature bath at 45 ° C. for 4 weeks after observing the condition over time. Then, the evaluation was made based on the following evaluation criteria. ⊚: Gel state stable even after 4 weeks at a temperature of 45 ° C. or higher ○: Gel viscosity slightly decreased Δ: Gel softening (separation-like) ×; Separation

[0021]

[Table 1]

[0022]

[Table 2]

* 1) Component A has the following composition. Polyethylene glycol 1500 2 (wt%) Glycerin 3 1,3 Butylene glycol 5 Xanthan gum 0.5 Methylcellulose 2 Sodium alginate 0.5 POE (12) POP (6) Butyl alcohol ether 5

In Table 2, in Comparative Example 1, since the number of moles of ethylene oxide added is small (n = 9.1), a skin cleansing agent having excellent stability over time cannot be obtained, and the effect of washing bare skin is poor. Further, in Comparative Example 4, since the number of moles of ethylene oxide added is large (n = 18.2), the makeup removing effect is insufficient. In Comparative Examples 2, 3, 5, and 6, since only nonionic surfactants other than polyethylene glycol fatty acid diester are used, the results that satisfy both the makeup removing effect and the bare skin washing effect cannot be obtained. Comparative Examples 7 and 8
Does not contain a nonionic surfactant, but contains an anionic surfactant or an amphoteric surfactant, so that both the makeup removing effect and the bare skin washing effect are poor. In Comparative Example 9, the polyethylene glycol fatty acid diester of the present invention was blended, but since it contained a liquid oil, the effect of washing bare skin was poor and the stability over time was poor.

Example 8 Dipropylene glycol 5 (wt%) Ethyl alcohol 10 EDTA-3Na.2H ₂ O 0.05 Carboxyvinyl polymer 0.5 Triethanolamine ₂ PEG600 Diisostearate 20 PEG400 Monooleate 5 Methylparaben 0.1 Fragrance Suitable amount Purified water Remainder [Production method] A water-soluble thickener is previously dissolved in a main kettle, and sequentially dissolved to obtain an invention product. The obtained skin cleanser was excellent in both makeup removing effect and bare skin washing effect.

[0026]

As described above, the skin cleansing agent of the present invention can remove hard makeup cosmetics in one step, and can wash bare skin to remove sebum and dirt completely in the pores. The stability over time is also good.

Claims (3)

[Claims] 1. The number of added moles of ethylene oxide is 10.
~ 18 polyethylene glycol dioleates and /
Alternatively, an oil-free skin cleansing agent comprising polyethylene glycol diisostearate in an amount of 1.0 to 80% by weight. 2. The number of added moles of ethylene oxide is from 4 to 4.
14 polyethylene glycol monooleates and /
Or polyethylene glycol monoisostearate 3
The skin cleansing agent according to claim 1, further comprising 0% by weight or less. 3. The skin cleansing agent according to claim 1, further comprising 0.5 to 30% by weight of one or more polyoxyalkylene-modified polysiloxanes.